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CN-121987309-A - Embryo transfer pipe auxiliary device

CN121987309ACN 121987309 ACN121987309 ACN 121987309ACN-121987309-A

Abstract

The invention belongs to the technical field of medical appliances, and provides an embryo transfer catheter auxiliary device which comprises an inner supporting core and a heating wire. The inner supporting core is formed by coaxially connecting a supporting rod and a flexible pipe with a closed front end, the flexible pipe is filled with phase change materials, and heating wires penetrate through the flexible pipe and are used for heating and softening the materials. The support rod is internally provided with a containing cavity, a sliding piston is arranged in the supporting rod, a plurality of support pieces are connected in series through connecting ropes and connected to the piston, the farthest end of the support piece abuts against the sealed end of the flexible pipe, and the piston can drive the support pieces to enter and exit the flexible pipe through movement of the piston, so that dynamic adjustment of the volume of the phase change material is realized. The support piece adopts an ultrasonic visual material or structure, so that the positioning in operation is facilitated. Due to the adoption of the structure, the device provides rigid support when the tube is placed, and can actively reduce the volume and soften after positioning, so that traction-free and low-resistance withdrawal is realized, simultaneously ultrasonic real-time guidance is supported, and the positioning precision and operation safety of the outer tube are obviously improved.

Inventors

  • LI PINGPING

Assignees

  • 中国人民解放军陆军军医大学第二附属医院

Dates

Publication Date
20260508
Application Date
20260211

Claims (10)

  1. 1. An embryo transfer catheter assistance device, comprising: An inner support core (20), wherein the inner support core (20) is used for being inserted into an embryo transfer catheter to support the embryo transfer catheter, the inner support core (20) comprises a support rod (21) and a flexible tube (22) which are coaxially connected, one end of the flexible tube (22) away from the support rod (21) is closed, the interior of the flexible tube (22) is filled with a phase change material, and A heating wire passing through the support rod (21) and extending into the flexible tube (22); The phase change material changes from a solid state to a liquid state after being heated, so that the flexible tube (22) changes from a rigid state to a flexible state, and the phase change material is conveniently extracted from the outer tube (10) of the embryo transfer catheter without driving the outer tube (10).
  2. 2. An embryo transfer catheter assistance device as claimed in claim 1, further comprising a plurality of supports (30); the plurality of supporting pieces (30) are arranged inside the flexible pipe (22), the heating wire penetrates through the middle part of each supporting piece (30), and the periphery of each supporting piece (30) is in contact with the inner wall of the flexible pipe (22).
  3. 3. An embryo transfer catheter auxiliary device as claimed in claim 2, wherein one end of said support rod (21) adjacent to said flexible tube (22) is provided with an axially extending receiving cavity (211), said receiving cavity (211) being in communication with the lumen of said flexible tube (22), two adjacent support members (30) being connected by a connecting cord, said support member (30) adjacent to said piston (40) being connected by a connecting cord to said piston (40), said support member (30) remote from said piston (40) being in abutment with the closed end of said flexible tube (22); The embryo transfer catheter assistance device further comprises: A piston (40), the piston (40) is slidingly arranged in the accommodating cavity (211), the outer wall of the piston (40) is dynamically sealed with the inner wall of the accommodating cavity (211), and -A driving mechanism (50), the driving mechanism (50) being adapted to drive the piston (40) axially along the housing cavity (211).
  4. 4. An embryo transfer catheter assistance device as claimed in claim 3, characterised in that said support (30) comprises: a first contact part (31); a second contact portion (32), the second contact portion (32) being arranged symmetrically to the first contact portion (31), and A plurality of arc-shaped bending parts (33), wherein two ends of the plurality of arc-shaped bending parts (33) are respectively connected with the first contact parts (31) and the second contact parts (32), and the arc-shaped bending parts (33) can be bent; when the plurality of support members (30) are abutted against each other, the arc-shaped bent portions (33) are bent outward.
  5. 5. An embryo transfer catheter assistance device as claimed in claim 4, characterised in that one end of said support rod (21) facing away from said flexible tube (22) is provided with a wire passage (212), said wire passage (212) being in communication with said receiving cavity (211); the drive mechanism (50) includes: The driving rope (51), the driving rope (51) is connected with the heating wire integrally, and the driving rope (51) comprises a wire inlet part (511) and a wire outlet part (512); the connecting block (52), the connecting block (52) is arranged in the accommodating cavity (211), and the connecting block (52) is provided with a first wire inlet hole (521); A first spring (53), both ends of the first spring (53) are respectively connected with the connecting block (52) and the piston (40), and -A locking assembly (60), said locking assembly (60) being disposed at a closed end of said flexible tube (22); The piston (40) is provided with a second wire inlet hole (41) and a second wire outlet hole (42), the first contact part (31) and the second contact part (32) are respectively provided with a third wire inlet hole (311) and a third wire outlet hole (312), the wire inlet part (511) sequentially penetrates through the wire passing holes (212), the first wire inlet holes (521), the second wire inlet holes (41) and the third wire inlet holes (311), the wire outlet part (512) penetrates through the wire passing holes (212) to be connected with the connecting block (52) and sequentially penetrates through the second wire outlet holes (42) and the third wire outlet holes (312) to be connected with the wire inlet part (511), the wire outlet part (512) is connected with the wire inlet part (511) at the locking assembly (60), and the locking assembly (60) can lock the wire outlet part (512).
  6. 6. An embryo transfer catheter assistance device as claimed in claim 5, characterised in that said locking assembly (60) comprises: The locking column (61) is coaxially connected with one end, far away from the supporting rod (21), of the flexible pipe (22), and a fourth wire inlet hole and a fourth wire outlet hole are formed in the locking column (61); A first support block (62), the first support block (62) being connected to an end of the locking post (61) facing away from the flexible tube (22); A first guide cylinder (63), the first guide cylinder (63) being fixedly connected to the side of the first support block (62) with its axis perpendicular to the axis of the locking column (61), and The locking block (64) is arranged on the first supporting block (62) in a sliding mode along the axis of the locking column (61), the lower end of the locking block (64) is provided with a locking cambered surface matched with the first guiding column (63), and the wire outlet part (512) is located between the locking block (64) and the first guiding column (63).
  7. 7. The embryo transfer catheter auxiliary device according to claim 6, wherein the upper end of the locking block (64) is provided with a mounting groove (641) extending along the axial direction of the locking column (61), and both sides of the locking block (64) are provided with locking windows (642) extending along the axial direction of the locking column (61); The locking assembly (60) further includes: The two matching blocks (65), the two matching blocks (65) are symmetrically arranged, and the two matching blocks (65) are connected with two sides of the first supporting block (62); The top plate (66), the top plate (66) is connected with the upper ends of the first supporting block (62) and the two matching blocks (65), and the top plate (66) is provided with a matching square hole; One end of the guide square column (67) is connected with the bottom of the mounting groove (641), and the other end of the guide square column (67) penetrates through the matched square hole and is connected with a pressing plate; The second spring (68), the second spring (68) is a tension spring, the second spring (68) is sleeved outside the guide square column (67), one end of the second spring (68) is connected with the bottom of the mounting groove (641), and the other end of the second spring (68) is connected with the lower end of the top plate (66); The two spring fins (69) extend along the axial direction of the locking column (61), and one end of each spring fin (69) away from the locking column (61) is connected with the inner wall of one side of the corresponding locking window (642) away from the locking column (61); Two stoppers (70), the two stoppers (70) are respectively connected with the inner walls of the corresponding matching blocks (65), and The two triangular blocks (71) are respectively connected with the outer sides of one ends, close to the locking columns (61), of the corresponding spring tilted sheets (69), one ends, far away from the locking columns (61), of the triangular blocks (71) are planes, and one surfaces, far away from the spring tilted sheets (69), of the triangular blocks (71) are inclined planes; the surface of the stop block (70) facing the locking column (61) is a plane, the inclined surface of the triangular block (71) can be in contact with the stop block (70), and the plane of the triangular block (71) can be in contact with the plane of the stop block (70).
  8. 8. An embryo transfer catheter assistance device as defined in claim 7, wherein said locking assembly (60) further comprises: the two wedge blocks (72), the two wedge blocks (72) are respectively connected with the outer side of one end, far away from the locking column (61), of the corresponding spring fin (69); A second guiding cylinder (73), the axis of the second guiding cylinder (73) is parallel to the axis of the first guiding cylinder (63), and the first guiding cylinder (63) is positioned between the second guiding cylinder (73) and the locking cylinder (61), and The unlocking sleeve is axially sleeved outside the locking block (64) in a sliding manner along the locking column (61), the unlocking sleeve is connected with the second guide cylinder (73) through a connecting piece, and one end, close to the locking column (61), of the unlocking sleeve is in contact with the inclined surface of the wedge-shaped block (72); The wire outlet part (512) passes through the fourth wire outlet hole, is positioned on the same side of the first guide cylinder (63) as the wire inlet part (511), passes through a gap between the first guide cylinder (63) and the locking block (64), and is connected with the wire inlet part (511).
  9. 9. An embryo transfer catheter assistance device as claimed in claim 8, characterised in that the outer periphery of said first guiding cylinder (63) and said second guiding cylinder (73) are each provided with a guiding groove along the circumferential direction; A flexible friction block (74) is arranged on the locking cambered surface of the locking block (64), and the friction block (74) can be embedded into the guide groove of the first guide cylinder (63).
  10. 10. An embryo transfer catheter assistance device as claimed in claim 9, characterised in that said locking assembly (60) further comprises: A second support block (75), the second support block (75) being connected to an end of the locking post (61) facing away from the flexible tube (22), the second support block (75) being parallel to the first support block (62), and And the shielding cover (76) is covered outside the first supporting block (62) and the second supporting block (75).

Description

Embryo transfer pipe auxiliary device Technical Field The invention relates to the technical field of medical appliances, in particular to an embryo transfer catheter auxiliary device. Background In assisted reproductive technology, embryo transfer is a critical step in the in vitro fertilization-embryo transfer (IVF-ET) procedure. Currently, embryo transfer catheter systems of a two-component construction are commonly used in clinic, which are composed mainly of an outer tube (outer length) and an inner tube (INNER CATHETER). In operation, a physician first inserts a rigid outer tube transcervically into a desired location within the uterine cavity to create a stable delivery path, and then inserts a flexible inner tube loaded with embryos from the proximal end of the outer tube and along its lumen to the depth of the uterine cavity, ultimately releasing the embryos precisely through the inner tube to the targeted implantation area. However, during placement of the outer tube into the uterus, the flexible outer tube is often difficult to pass smoothly and position accurately due to individual differences in cervical anatomy (e.g., curvature, stenosis) and uterine location of the patient. To address this problem, the prior art has typically pre-inserted a rigid or semi-rigid support core (e.g., wire or rigid plastic rod) inside the outer tube to enhance the overall rigidity of the outer tube so that it can conform to and traverse the complex cervical-uterine path. However, this method has a significant technical disadvantage in that the support core must be completely withdrawn after the outer tube has successfully reached the target location. At this time, if the outer tube is pre-bent to a specific shape to match the anatomy of the patient, the rigid support core will generate a larger pulling force due to its elastic restoring force or friction with the inner wall of the outer tube during the back-drawing process, which is very easy to cause the precisely positioned outer tube to shift, twist and even be brought out of the uterus. This not only can destroy the accuracy of the operation, affect the implantation position of the embryo, but also can cause endometrial damage, thereby reducing the success rate of pregnancy. Disclosure of Invention In response to the deficiencies of the prior art, the present invention provides an embryo transfer catheter assistance device that solves or at least alleviates one or more of the above-mentioned and other problems of the prior art. The invention provides an embryo transfer catheter auxiliary device, comprising: An inner support core, which is used for being inserted into an outer tube of the embryo transfer catheter to support an outer tube, and comprises a support rod and a flexible tube which are coaxially connected, wherein one end of the flexible tube, which is far away from the support rod, is closed, the interior of the flexible tube is filled with a phase change material, and The heating wire passes through the supporting rod and extends into the flexible pipe; the phase change material changes from solid state to liquid state after being heated, so that the flexible tube changes from rigid state to flexible state, and the phase change material is conveniently extracted from the outer tube of the embryo transfer catheter without driving the outer tube. Preferably, the embryo transfer catheter assistance device further comprises a plurality of supports; The supporting pieces are arranged inside the flexible pipe, the heating wires penetrate through the middle parts of the supporting pieces, and the periphery of each supporting piece is in contact with the inner wall of the flexible pipe. Preferably, one end of the support rod, which is close to the flexible pipe, is provided with an accommodating cavity extending along the axial direction, the accommodating cavity is communicated with the inner cavity of the flexible pipe, two adjacent support pieces are connected through a connecting rope, the support piece, which is close to the piston, is connected with the piston through the connecting rope, and the support piece, which is far away from the piston, is propped against the closed end of the flexible pipe; The embryo transfer catheter assistance device further comprises: A piston slidably disposed in the accommodating chamber, the outer wall of the piston being in dynamic seal with the inner wall of the accommodating chamber, and And the driving mechanism is used for driving the piston to axially move along the accommodating cavity. Preferably, the support comprises: A first contact portion; a second contact portion symmetrically arranged with the first contact portion, and The two ends of the plurality of arc-shaped bending parts are respectively connected with the first contact part and the second contact part, and the arc-shaped bending parts can be bent; when the plurality of supporting pieces are abutted against each other, the arc-shaped bending porti